Kansas University ROTC Cadet Maj. Nate Kalish, St. Louis, left, runs through a timed assembly of an M4 machine gun with his team partner, Sgt. 1st Class Andrew Acosta, Los Angeles, during the 19th annual Ranger Buddy Competition on Saturday at the Sesquicentennial Park area. Pairs of ROTC cadets competed in six separate obstacle courses and performed various essential tasks for the title of Best Ranger Buddy Team.